Influence of β-Si3N4 particle size and heat treatment on microstructural evolution of α:β-SiAlON ceramics

Açıkbaş, Nurcan Çalış; Kumar, Rajiv; Kara, Ferhat; Mandal, Hasan; Basu, Bikramjit

doi:10.1016/j.jeurceramsoc.2010.10.001

Cited by 32 publications

(7 citation statements)

References 25 publications

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“…For its high modulus and high hardness, the strengthening phase Yb 4 Si 2 O 7 N 2 can consume more fracture energy during the processes of crack propagation. Meanwhile, the fine and even interlocked microstructure of the composites could lead to a simultaneous improvement of strength and toughness [34].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites

Chen

Zhang

et al. 2018

J Adv Ceram

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A series of h-BN based composites with Yb 4 Si 2 O 7 N 2 as a secondary phase were successfully synthesized by an in situ reaction hot pressing method. It was found that the relative density and room-temperature mechanical properties monotonically increased with increasing the content of Yb 4 Si 2 O 7 N 2 from 20 to 50 vol%. When 50 vol% Yb 4 Si 2 O 7 N 2 was introduced, the relative density of the composite reached 98.75%, and its flexural strength, compressive strength, fracture toughness, and hardness reached 338±10 MPa, 803±49 MPa, 2.06±0.06 MPa•m 1/2 , and 2.69±0.10 GPa, respectively. The strengthening effect of Yb 4 Si 2 O 7 N 2 was mainly attributed to its high modulus and high hardness. Fine microstructure was also advantageous to strength and could lead to more tortuous crack propagation paths and then improve the fracture toughness of the composites simultaneously. Meanwhile, the composites maintained good machinability.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites

Chen

Zhang

et al. 2018

J Adv Ceram

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“…Most approaches tried to create a microstructure with reinforcing phases evenly dispersed in the matrix. The reinforcing phases included rod-like β-Si 3 N 4 [2][3], various particles or carbon structures such as carbon fibers, nanotubes [4][5] or most recently graphenes [6] or more precisely graphene nanoplatelets (GNP). By the virtue of its outstanding mechanical properties including high tensile strength and Young modulus graphene shows great promise as a nanofiller in composite materials [7].…”

Section: Introductionmentioning

confidence: 99%

Spark plasma sintering of Si₃N₄/multilayer graphene composites

et al. 2014

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Mulitlayer graphene reinforced silicon nitride composites were prepared by spark plasma sintering to investigate the effect of the graphene addition on mechanical properties. The composites contained multilayer graphene (MLG) in various (0, 1, 3 and 5 wt%) content. Significantly higher fracture toughness of 8.0 MPa m 1/2 was obtained at 1% MLG content, however, on further increasing the graphene content the toughness did not increase, but dropped to the value of the monolithic silicon nitride. The maximum hardness of 18.8 MPa was also obtained at 1% MLG, while at higher MLG contents it gradually decreased.

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“…[5][6][7] Among them, β-SiAlON ceramics described by the formula Si 6-z Al z O z N 8-z , where Z represents the substitution of Z Si-N bonds by Z Al-O bonds [8], are used under demanding working conditions, such as cutting tools and wear components, due to their high hardness and outstanding wear resistance [9]. In previous studies, β-SiAlON ceramics were prepared by sintering, such as hot pressing [10][11][12] and spark plasma sintering (SPS) [13][14][15][16] of Si 3 N 4 , Al 2 O 3 and AlN blended powder. However, sintering is unsuitable for components with complex shapes and large sizes.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Wear Behavior of Plasma-Sprayed TiO2–SiAlON Ceramic Coating

Wang¹,

Wan²,

Mao³

et al. 2020

Coatings

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In this study, atmospheric plasma spray was employed to deposit TiO2–SiAlON ceramic coating on 316 stainless steel. The phases and microstructure of the ceramic coating were investigated. Additionally, comparative studies on the tribological performances of the substrate and the ceramic coating, under both dry and starved lubrication conditions, were carried out. The SiAlON phase was preserved, while partial TiO2 anatase was transformed to rutile phase. The wear rate of the coating was roughly 1/3 of that of the substrate under both conditions. The wear mechanisms of the ceramic coating were surface fracture and abrasive wear in both cases, and the coating under starved lubrication underwent less abrasion. The pores in the coating served as micro-reservoirs, forming an oil layer on the mating surface, and improving tribological properties during sliding.

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Influence of β-Si3N4 particle size and heat treatment on microstructural evolution of α:β-SiAlON ceramics

Cited by 32 publications

References 25 publications

Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites

Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites

Spark plasma sintering of Si₃N₄/multilayer graphene composites

Microstructure and Wear Behavior of Plasma-Sprayed TiO2–SiAlON Ceramic Coating

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Influence of β-Si3N4 particle size and heat treatment on microstructural evolution of α:β-SiAlON ceramics

Cited by 32 publications

References 25 publications

Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites

Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites

Spark plasma sintering of Si3N4/multilayer graphene composites

Microstructure and Wear Behavior of Plasma-Sprayed TiO2–SiAlON Ceramic Coating

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Spark plasma sintering of Si₃N₄/multilayer graphene composites